Weeder-tooth.



No. 718,070. I PATENTBD JAN. 13, 1903. L. 1). AUSTIN.

WEEDBR TOOTH.

. APPLICATION FILED saw. 10. 1902.

no MODEL.

W1 messes:

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UNITED STATES PATENT O FICE."

LEWITT D. AUSTIN, OF KALAMAZOO, MICHIGAN.

WEEDER-TOOTH.

SPECIFICATION forming part of Letters Patent No. 718,070, dated January 13, 1903.

Application filed September 10,1902. Serial No. 122,756. (No model.)

T0 at whom it may concern.-

Be it known that I, Lnwrrr D. AUSTIN, a citizen of the United States, residing at the city of Kalamazoo, in the county of Kalamazoo and State of Michigan, have invented certain new and useful Improvements in Weeder- Teeth, of which the following is a specification.

This invention relates to improvements in weeder-teeth.

It is desirable that weeder-teeth should have a comparatively slender engaging portion and be quite flexible, so that they will yield quite readily in order to accomplish desirable results. It is also desirable that there should be little or no sidewise or lateral movement to the tooth when in use and that when the tooth is deflected its resistance to pressure be increased.

The objects of this invention are to provide a weeder-tooth for light purposes which possesses all the requirements of an efficient weeder-tooth and at the same time is very strong and durable and economical to produce.

Further objects will definitely appear in the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is fully illustrated in the accompanying drawings, forming a part of this specification, in whioh-.

Figure 1 is a detail perspective View of my improved tooth and a section of the frame, which shows the manner of securing the tooth thereto. Fig. 2 is a detail side elevation of a structure appearing in Fig. 1, being shown in section to show the relation of the parts.

In the drawings similar letters of reference refer to similar parts throughout both the views.

Referring to the lettered parts of the drawings, A represents a portion of the frame of the weeder. The bar A is preferably made of angle-iron.

My improved tooth is formed of a pair of superimposed flat springs B B, which are united by welding or other suitable means at their lower ends to form the engaging portion B of the tooth. The engaging portion B is preferably formed triangular in crosssection, with a corner forward, as I believe that form to be the most desirable. It may,

however, be any form desired, and this shaping can be done when the springs are united. The tooth is secured to the angle-bar A of the frame of the Weeder by placing one of the springs above and theother below a leg of the same and securing the parts in that position by a bolt, as a. This spreading of the upper ends of the springs gives them a brace effect upon each other, so that the resistance greatly increases after the springis deflected.

It is found that in use my improved tooth yields very readily to slight obstructions, or obstructions having slight resistance, as the brace action is not materially called into effect by a slight springing of the tooth, which is a very desirable result in weeder-teeth. It is found, however, that when a considerable resistance or obstruction is encountered by a tooth the bracing effect of the springs is called into action, the tooth increasing very rapidly in its tension as it is forced backward. Therefore,the tooth will overcome or pass over the obstruction without injury to itself. It is apparent that there is no lateral movement or twisting movement of the tooth possible in my improved construction. My improved tooth is also very economical to produce, and as the springs B can be formed of very light material a very sensitive tooth is secured and the same is still very strong and durable. This form of tooth is also very desirable as a harrow-tooth, although it is particularly valuable as a weeder-tooth.

I have illustrated and described my improved weeder-tooth in the form preferred by shown is very meritorious, and protection is V asked for the specific form aswell.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a weeder or the like, the combination of a tooth comprising: a pair of superimposed springs united at theirlower ends; a suitable frame, and means for securing said tooth to said frame whereby the upper ends of said springs are held normally apart, for the purpose specified.

2. A tooth for weeders or the like, comprising a pair of superimposed springs, united at their lower ends, for the purpose specified. 

